Triumph Speedtriple

Discussion in 'Technical Help' started by Michael Gregory, Jul 14, 2019.

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  1. Michael Gregory

    Michael Gregory New Member

    Jul 3, 2018
    10
    3
    Oxford uk
    Hi guys any body help please
    Just fitted LED headlight bulbs to my twin headlamps when I use passing switch both lamps come on however when I put main beam on via the handlebar switch one of the bulbs go out dipped beam is fine I have tested both bulbs and they are ok I know when you fit led indicators the relays have to be changed so could this be a relay problem or is there something I'm missing when I put the original bulbs back in all is ok
    Help please
     
  2. freck

    freck Noble Member
    Subscriber

    May 4, 2017
    923
    450
    Preston, Lancs, UK
    Have you tried swapping the new bulbs around to see if it’s still the same side affected?
     
  3. Sprinter

    Sprinter Kinigit

    Aug 17, 2014
    5,314
    800
    Grampian.
    Didnt that bike do that as standard and you could buy an upgrade from square deals to make them both come on at once?
     
  4. Michael Gregory

    Michael Gregory New Member

    Jul 3, 2018
    10
    3
    Oxford uk
    Hi Freck
    Yeh swapped em over allways the nearside goes out
     
  5. freck

    freck Noble Member
    Subscriber

    May 4, 2017
    923
    450
    Preston, Lancs, UK
    It sounds very strange that it’s all ok with the original bulbs but not with LEDs. Could it be a bad connection with the new LED on the side that goes out?
     
  6. D'Ecosse

    D'Ecosse Well-Known Member

    Jun 23, 2019
    178
    93
    CA, USA
    Be useful if you add the info on your model/year
    From avatar it looks like 99-01 Speed Triple

    Whether flash to pass or hi off hi/low switch both circuits are identical in regard powering the lamps high beam lamps
    One difference however is that with the 'flash' switch, if it is already on low beam, it will actually flash the High beams without actually turning off the low! (with incandescents this means that all 4 filaments would actually be on - with LEDs there are usually just additional elements added)
    So you may be confused as to whether it is really working properly with the flash, as what you are probably seeing is the one lamp just remaining on low, while the second is truly going 'high'.

    The way the lighting circuits work on that generation (and indeed the next gen) is that the hi/low switch powers ONE lamp directly (opposite lamps for high and low) and the alternative lamp low/high are powered respectively via a headlight relay (again that would be opposite lamp elements for each function)
    If ONE of the lamps is NOT coming on in high beam, it pretty much HAS to be the high beam relay.
    Be careful when replacing - those headlight relays are not 'typical' convention of most common or garden std relays; they have the common and the coil positive terminal in swapped locations; if you replace with a 'std' relay all will appear to function correctly however the relay coil will be energized all the time, even with ignition off - the headlight will be off, but because the relay is energized, if the bike is not ridden for several days (or not on a battery tender) it will discharge the battery.
     
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  7. Red Thunder

    Red Thunder Elite Member
    Subscriber

    Dec 2, 2014
    1,477
    700
    High Wycombe
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